<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script type="text/javascript">
			function $$ (id){
				return document.getElementById(id);
			}
			window.onload = function(){
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				cxt.arc(70,70,50,0,-90*Math.PI / 180,true);
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				cxt.lineTo(120,120);
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	</head>
	<body>
		<canvas id="canvas" width="200" height="150"style="border: 1px dashed gray;"></canvas>
	</body>
</html>
